In Physics, whenever we study forces — from a push on a table to a rocket launch — we measure them in Newtons. Understanding this unit is fundamental to Class 9 and 11 Physics.
Newton is a derived SI unit — it is derived from the base units of kilogram (mass), metre (length), and second (time). The base SI units themselves include kg, m, s, A, K, mol, and cd.
Newton (N) is the SI (International System of Units) unit of Force.
It is named after Sir Isaac Newton (1643–1727), the physicist who formulated the laws of motion and universal gravitation.
1 Newton is defined as the force required to accelerate a mass of 1 kilogram at a rate of 1 metre per second squared.
Mathematically: F = m × a
1 N = 1 kg × 1 m/s²
So: 1 N = 1 kg·m/s²
In the CGS system, the unit of force is the **Dyne**. 1 Newton = 100,000 Dynes (10⁵ dynes).
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